Of the "end tree wonders", there are 2 that have some balance concerns to me. Forbidden Palace: -15% building buy costs. When you are playing a progress/industry play, the gold savings is immense. Generally with this style of play I am buying nearly every building and the effects just keep adding up. I think this may stack too well with the tree it comes from. Broadway: Gain 250 culture when completing a building in this city, era scaling (so 1250 - 1750). The culture from broadway is actually very high when you combine with the aggressively building style you normally have under this tree. I've managed to augment my entire Civs CPT by about 15% with this wonder alone. Its not just very strong, but it actually makes industry a "culture tree", which to me is not really the point of the tree. Thoughts?